wheatear trapping

I stopped off at langaurd nr on my way home from work . I had just arrived when the warden from the observatory approached me and asked if I could help round up some of the wheatear as he had placed some ground traps up ahead . After approx 10 Min's bingo one had taken the meal worm and I was soon asking to take some photos . There was around 40 wheatear on site he had been trapping for an 1 hour and this was his second bird .